Air-cooled engine



March 29 1927.

A. F. MASURY ET AL AIR COOLED ENGINE Filed Dec. 22, 1925 2 Sheets-Sheet l tofs u w .HT P. KN D l A .s .www M, 4/

March 29 1927 A. F. MAsuRY ET Al.

AIR COOLED ENGINE Filed Dec. 22, 1925 2 sheets-sheet 2 Patented Mar. 29, 1927.

UNITI-:D STATES PATENT y OFFICE.

ALFRED F. MASURY AND CHARLES FROESCH, OF NEW YORK, N. Y., ASSIGNORS TO i' INTERNATIONAL MOTOR COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DEL AWARE.

AIR-COOLED ENGINE.

This invention relates broadly to enclo-l sures for internalcombustion engines and 4more particularly, in an air cooled engine, to the structure by which the current of coolving air is brought into and removed from contact with the walls of the engine. The object of the present invention is to provide an enelosurefor the engine which may be availed of, if "desired, to facilitate the admission land escape of the cooling air and which embodies certain novel features having to do with a simplification of the enclosure in the interest of ease of manufacture and convenience in use. To this end the cam shaft which actuates the gears is disposed within a housing utilized as an element of the engine enclosure and from this housing there extends in a generally downward and outward direction, side walls of the enclosure to be supported by a transverse floor defining the bottom of the enclosure. 'llhis floor is preferably formed integral with the engine crank case and extends forwardly of the engine toI support a front end member which may be formed with a forwardly directed opening through which air enters or is drawn by a fan disposed there-within While the invention is not limited in its use to a conveyance, such as a motor vehicle or airship, it will be found particularl applicable to self-propelled vehicles. hese and other objects of the invention and the means for their attainment will be more apparent from the followy ing detailed description of a preferred embodiment thereof which is illustrated in the accompanying drawings, and in which:

vFigure l is a view in side elevation showing the engine and the enclosure therefor according to the present invention, the side walls of the enclosure being removed in the interest of clearness.

Figure 2 is a transverse, vertical sectional view taken through one of the cylinders and showing the enclosure forming the passa-ge for the coolingair and the means of egress of the air after a heatinterchange has taken place.

Figure 3 is a plan view of the engine and enclosure, looking from above, and showing the path taken lby the air from the time it nters the enclosure until it is emitted thererom.

Application led December 22, 1925. Serial No. 77,159.

as applied to an air cooled internal combustion engine it will be apparent as the description proceeds that certain features thereof are applicable in situations other than when air is used as the-cooling medium. The engine, which may be of any desired type, is illustrated as comprising four spaced cylinders a having formed thereon cooling fins rz. and supported from a common crank case b. The crank case may be supported as by the arms or brackets b from the longitudinal side members c of the vehicle frame. The cam shaft d which actuatcs the valves e of the respective cylinders is located above the bank of cylinders and is disposed within a housing f containing lubricant. The housing-c is utilized as a part of the enclosure serving, in connection with an air cooled engine, as the passage for the cooling air. To this end it is disposed suiiiciently above the engine to afford an air passage f thereabove and is formed with flanges f2 on either side to which the side-walls g mav be hinged or otherwise secured. These side walls ,extend generally downwardly and outwardly to engage'with or unite with the floor of the air passage. This door is preferably a flange b2 formed integral with the crank case b, below which the carbureter h. and the exhaust pipe z are disposed, and which extends forwardly of the engine as at b2* to support the front end j of the enclosure.

'lhe cooling air is drawn into the enclosure through a screened openingl y" either by the `forward motion of the conveyance or by the action of a fan k within a housing k whereof the inlet 7a2 faces the opening j and is directed into one side of the enclosure through an inlet les formed by a balile Z. From one side of the bank of cylinders the air flows to the other side. as shown by the arrows, around the individual cylinders and is directed into contact with the cooling fins and cylinder Walls by deflectors m, n, where a heat interchange takes place. The deflector m comprises a section of pyramidal half section disposed with the acute edge in the direction of the approaching air to deflect it upwardly and against the cylinder. The

warmed air is permitted to escape through apertures or louvers g formed in the one wall g.- It is to be noted that the air enters the enclosure and first contacts with the cyl- While the mventlon has been lllustrated y inders on the side opposite to the exhaust manifold z" so that no heat is taken up by the air prior to its contact With thecylinders.

The housing f for the cam shaft may take various forms. A preferred construction is illustrated in the drawings and comprise a four sided box or tube supported at the front end by the housing o containing the driving connection for the fan and cam shaft d and at the rear end in any convenient manner, say by a transverse partition p serving as the rear wall of the engine enclosure. The valve stems enter the housing for engagen'ient by the cams through spring guides l] threaded into openings f3 in the bottom and sealed against escape of lubricant by telescoping caps 1' engaging the respective spring seats s on'the top of the valve stems.

By the construction described a particu1ar ly efficient cooling of an internal combustion engine is effected and the enclosure or air channel within which the engine is'disposed is simplified by taking advantage of. auxiliary structures of the engine.

Various modifications may be made in the arrangement and configuration of the component elements going to makeup the device as a whole and are to be deemed Within the spirit and scope ofthe invention as set out in the appended claims.

What we claim is:

1. In combination, an internal combustion engine comprising spaced cylinders having an exhaustmanifold along one side, anv enclosure for the engine formed with an opening inthe front end and louvers on the side adjacent the exhaustmanifold, a fan disposed in front of the engine and a fan housmg having an inlet adjacent the opening in the enclosure and an-outlet to deflect the air from the fanto the side of the engine away from the exhaust manifold.

2. In combination, an internal combustion engine comprising spaced cylinders having an exhaust manifold along one side, a hood Jfor the engine formed Wlth an opening in the front end and louvers on the sideadjacent the exhaust manifold..a transverse horizontal floor integral with the crank case upon which the hood is supported at the o uter edges thereof, a fan disposed in front of the engine and a fan housing having an inlet adjacent the opening in the hood and the front end and louvers on the side adja.

cent the exhaust manifold, a transverse horizontal floor integral with the crank case uponwhich the hood is supported at the (outer edges thereof, a fan disposed in fron-t of the englne, a fan housing havmfr an mlet adjacent the opening 1n the hood and an outletto deflect the air from the fan to the side of the engine awayvfrom the exhaust manifold, and deflectors carried with the crank case to deflect the air against the cylinder.

4. The colnbination with an internal combustion engine and a cam shaft, of an enclosure for the engine comprising a housing for the cam shaft, a horizontal flange along either side of the engine and side walls connected to the housing and extending to the flanges. 1

5. The combination with an internal combustion engine including a crank case and having a cam shaft. of an enclosure for the engine comprising a housing for the cam shaft, a horizontal flange formed along both sides and front of the crank case, side walls connected with the housing and extending to the flange, one of said side walls being formed with an opening and a front. end member having an opening and supported on the flange, means to induce a flow of air into the enclosure through the opening. and means to direct the air to one s ide of the engine.

6. In combination, a housing for a cam shaft comprising a four Walled tube whereof the bottom wall is formed with a plurality of apertures, cylindrical valve spring guides disposed Within the apertures, and caps carried in telescoping engagement with the guides.

This specifica-tion signed this 9th day of December A. D. 1925. 4

ALFRED F. MASURY. CHARLES FRoEsoH. 

